once you have actually run the buildcubemaps command the data is written to the bsp - but you must actually reload the map to see the changes,
i just added 1 cubemap to my map and did a quick and dirty compile to test things out,
This is normal and expected
Code:
*** Error: Skybox vtf files for skybox/sky_gravel_01 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_gravel_01 to build the default cubemap!
*** Error: Skybox vtf files for skybox/sky_gravel_01 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_gravel_01 to build the default cubemap!
Then in game i used just the following for a quick and dirty look at cubemaps,
sv_cheats 1 (because i didnt run in -dev mode)
mat_specular 0
buildcubemaps
map YOURMAPNAME (to reload the map)
mat_specular 1 (to revert it back to its original setting)
purple checkered water now looks correct, the code from the console was as follows,
Code:
Current mod isn't in a subdirectory of "game"!
bounce: 1/1 sample: 1/1
*** Error: Skybox vtf files for sky_gravel_01 weren't compiled with the same size texture and/or same flags!
Can't load skybox file sky_gravel_01 to build the default cubemap!
So basically did you actually re-load the map after building the cubemaps to see the changes?.